package com.aliyun.oss;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;

public class AliyunUtils {
    private AliyunOssPropreties aliyunOssPropreties;

    public void setAliyunOssPropreties(AliyunOssPropreties aliyunOssPropreties) {
        this.aliyunOssPropreties = aliyunOssPropreties;
    }

    public String storeFile(MultipartFile multipartFile) throws  IOException, com.aliyuncs.exceptions.ClientException {
        String endpoint = aliyunOssPropreties.getEndpoint();
        String bucketName = aliyunOssPropreties.getBucketName();
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        InputStream inputStream = multipartFile.getInputStream();
        String objectName =  multipartFile.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + objectName.substring(objectName.lastIndexOf("."));
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
        try {
            ossClient.putObject(bucketName, objectName, inputStream);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            inputStream.close();
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
        String url = endpoint.split("//")[0] + "//" + bucketName + endpoint.split("//")[1] + "/" +  fileName;
        return   url;
    }
}